MACRO SENSORS is introducing a line of LVDT-based dimensional gauging probes that provide accurate and precise measurement of dimensions in a variety of quality control, inspection equipment, and industrial metrology applications, including online parts inspection, servo-loop positioning systems, and manufacturing process control. The BB Series devices are available in four models — including full bridge, half bridge, pneumatic and soft touch — and can be used in automotive, medical, and aerospace manufacturing to control the precise dimensional parameters of their products.

The BB Series AC-operated LVDT gauge heads measure the position of a target surface, with an unusually high degree of accuracy. Complete systems for “go/no/go” inspection of complex mechanical parts can be assembled using several gauge heads mounted in suitable fixtures.

The LVDT dimensional gauging probes combine a special AC-LVDT with a linear ball bearing assembly to reduce radial play and core skewing, resulting in exceptional repeatability of 0.000006 inch (0.15 microns). Using an LVDT for probe shaft displacement sensing eliminates any additional transducer errors due to friction, stiction, or mechanical hysteresis. The BB Series also offer long life of 2×108 cycles. Other notable features of these spring-loaded LVDTs include: user-adjustable pre-travel; reduced susceptibility to temperature changes; positive stops prevent mechanical damage to the probe from repeated overstroking; and rubber bellows covering the probe shaft prevent the entrance of contaminants into the bearing.

The BB units are available in three standard ranges: +0.020 in. (+0.5 mm), +0.100 in. (+2.5 mm) and +0.200 in. (+5.0mm). Macro Sensors manufactures a full line of support electronics for these spring-loaded LVDTS including OEM modules, DIN-rail mount line-powered and DC-operated signal conditioners and digital display and control instruments.